Picking cam mounting



Aug. 14,1951 F. G. LAKE 2,564,335

P ICKING CAM MOUNTING Filed March 11, 1949 INV TOR. FRANCIS GER D LAKEATTORNEY Patented Aug. 1 1, 1951 PICKING AM MOUNTING Francis GerardLake, New York, N. Y., assignor, by mesne assignments, to Steel andAlloy Tank Company, Newark, N. J a corporation of New Jersey ApplicationMarch 11, 1949, Serial No. 80,877

3 Claims.

The present invention relates to loom cams and mor particularly to theconstruction and mounting of the picking cams.

In prior art constructions, the picking cam hub is afiixed to thepicking cam shaft by set screws alone. The use of keys in conjunctionwith set screws for securing the picking cam hub to the shaft isgenerally avoided as undesirable, because slippage of the set screwscauses the keys to wear the shaft quickly and thereby makes it necessaryto replace said shaft frequently.

One object of the present invention is to provide a new and improvedpicking cam hub constructed to permit easy replacement of the wearableparts thereof andto permit easy rotative adjustment of the picking camwith respect to the picking cam hub and the picking cam shaft.

Another object of the present invention is to provide a new and improvedpicking cam mounting, which allows for th keying of the picking cam hubto the picking cam shaft without the usual rapid wear of said shaft inuse.

Various other objects of the invention will be apparent from thefollowing particular description and from an inspection of theaccompanying drawings, in which: Fig. 1 shows, partly in section andpartly in face view, a left-hand picking cam and pickingcam hub assemblyembodying the present invention;

7 Fig. 2 is a section of the arrangement shown in Fig. 1, but taken online 2-2 thereof; and

Fig.3 is a top. plan view of the arrangement shown inFig.1.

Referring to the drawings, the loom, aside from the picking mechanism tobe described, may be of the general conventional type or may be of theimproved type shown in copending application Serial No. 691,237, filedAugust 17, 1946, now Patent No. 2,533,128. In this improved type ofloom, instead of the conventional loomside with a single frame web, eachloomside comprises a pair of parallel webs I0 and II, as shown,supporting different parts of the picking mechanism to be described.

In the drawings, the left-hand picking cam setup is shown. However, itmust be understood that the picking mechanism on the right-hand loomsideis similar in construction.

The picking cam set-up comprises a picking cam I2 secured to a cam shaftI3 which is supported in bearings (not shown) mounted on the frame websIll and II respectively on one loomside and which is similarly supportednear its other end in the other loomside. The cam shaft I3 mayconstitute the main cam shaft as inthe case of a conventional loom ormay be a separate picking cam shaft.

The picking cam I2 comprises a main segmental cam disc section I5 and asegmental cam disc toe or nose section I6 detachably joined togetheralong generally radial planes, as will be more fully described, todefine conjointly a continuous cam surface I1. The picking cam I2 issupported on a hub 20 which is provided with a longitudi-' nal split 2|on one side and which has an inner sleeve section 22 extending with asnug fit into the center hole of said cam, an outer sleeve section 23beyond said cam and a flange 24 be-' tween said sleeve sections engagingthe outer face of the cam disc sections I5 and I6. The hub 20 has akeyway 25 for keying engagement with the cam shaft I3 through a key 26.

For adjustably securing th cam disc mem-' hers I 5 and I '6 to the hub20, the flange 24 of said hub has a series of elongated arcuate slots 30con- 1 centric with the axis of said hub and receiving machine bolts 3|.The bolts 3| pass through the cam disc sections l5 and I6 and are lockedby means of nuts 32 threaded on said bolts and hear. ing against theouter faces of the cam disc sections through washers or through abacking plate 34 to be described. The bolts 3| are desirably arranged,so that two of these pass through the main cam disc section I5 and twopass through the cam disc toe section I6.

For adjustably turning the cam I2 with respect to the hub 20, there isaffixed to said cam a headed stud pin 36 press-fitted into the mainsection I5 of said cam and extending substantially parallel to the axisof said hub. The hub flange 24 has a pair of lugs 3? flanking the studpin 36 and carrying respective studs 38 threaded therein. These studs 38impinge at their inner ends against opposite sides of the pin 36 and areof the socket head type to receive a turning tool. Nuts 40 threaded onthe studs 38 and bearing against the outer faces of the lugs 31 locksaid studs in adjusted position. After the locking nutsdll have beenloosened, and while the bolts 3| are released, the studs 38 may beturned to effect fine adjustment of the rotary position of the cam I2with respect to the shaft I3, so that the timing of the picking motionin relation to the speed of the loom and the width of the fabric wovenmay be selectively adjusted.

The toe or nose cam section I6 wears faster than the other parts of thepicking cam and, therefore, has to be replaced from time to time.Consequently, the nose cam section is made a separable part. To thatend, the main cam section l has on each side offset radial edges 42 and43 defining a, keying configuration and the nose cam section 16 hascorresponding oifset radial side edges for interlocking engagementtherewith against relative radial displacement. The two cam sections I5andJB are of equal width, so that they will lie flush in the same planeand are held against relative axial displacement by the backing plate 34extending across the radial jointures formed between the two camsections and by the two bolts 3| passing therethrough.

By reversing the stud pin 36, the picking cam I2 may be used for theright-hand side of the loom.

For clamping the hub 20 to the cam shaft [3, the split outer sleevesection 23 of said hub is tapered at its outer periphery 45 and isembraced by a correspondingly tapered clamping collar 46. A lock-nut andwasher device 41 serves to press the clamping collar 46 inwardly towardsthe cam l2 and at the same time retains said collar in position. In theform shown, the locking device 41 comprises a lock-nut 50 threaded onthe outer end of the outer hub sleeve section 23 and a metal washer 5|between said nut and the clamping collar 46. The washer 5| has a tab 52projecting from its inner periphery into a recess 53 in the hub sleevesection 23, to hold said washer against rotation with respect to saidhub sleeve section while the lock-nut 50 is being tightened. The washer5| also has a series of locking fingers 54 at its outer periphery andthe lock-nut 50 has on its outer periphery a plurality of notches 55,four being shown quadrantly arranged. When the lock-nut 50 has beenturned to the proper extent to aiford thedesired holding pressurebetween the hub 20 and the cam shaft 13 and to align the washer fingers54 with respective locknut notches 55, these fingers are bent into therespective registering notches to secure said locknut in position.

The cam arrangement described permits the use of a key connectionbetween the picking cam L2 and the cam shaft l3 and clamps the hub 20 ofsaid cam tightly around said shaft. This prevents axial or rotationalslippage of the hub 20 on the cam shaft l3 and thereby reduces to aminimum the stresses resulting from the key connection.

While the invention has been described with particular reference to aspecific embodiment, it is to be understood that it is not to be limitedthereto but is to be construed broadly and restricted solely by thescope of the appended claims.

What is claimed is;

1. In a picking mechanism for a loom, a picking cam disc member havingan axial aperture, a hub for said cam'member adapted to embrace thepicking cam shaft and slotted for keyed engagement with said shaft, saidhub having a sleeve section extending into said aperture, an externallytapered longitudinally split sleeve section 4 extending axiallyoutwardly beyond said cam member, and a flange member between saidsleeve sections extending radially outwardly from said sleeve sectionsand in engagement with a face of said cam member, one of said membershaving one or more elongated slots concentric with the axis thereof,screws passing through respective slots to secure adjustably said cammember to said hub, an internally tapered collar embracing the taperedsleeve section and adapted to clamp said latter sleeve section to saidshaft as said collar is moved axially, a nut threaded on said taperedsleeve section and engaging said collar for moving said collar axiallytowards clamping position, and for holding said hub in clamped position,and means for locking said nut in position.

2. In a picking mechanism, a picking cam, a hub for said cam, adjustablemeans connecting said hub and said cam for rotation in unison, whilepermitting adjustment in the rotative position of said cam with respectto said hub, and means for adjustably rotating said cam relative to saidhub and including a pin on said cam spaced from the axis thereof andextending sub. stantially parallel to said axis, a pair of lugs rigidwith said hub and flanking said pin, and adjusting screws threaded intosaid lugs respectively and adapted to impinge on said pin for adjustingoperation.

3. In a picking mechanism, a picking cam member, a hub for said cammember having a flange member in engagement with a face of said cammember, one of said members having one or more elongated slotsconcentric with the axis thereof, screws passing through respectiveslots to secure adjustably said cam member to said hub for rotation inunison, while permitting adjustment in the rotative position of said cammember with respect to said hub, and means for adjustably rotating saidcam member relative to said hub and including a pin on one of said members spaced from the axis thereof .and extending substantially parallelto said axis, a pair of lugs rigid with the other of said latter membersand flanking said pin, and adjusting screws threaded into said lugsrespectively and adapted to impinge on said pin for adjusting operation.

FRANCIS GERARD LAKE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 503,473 Emery Aug. 15, 1893929,762 Hess Aug. 3, 1909- 929,851 Hess Aug. 3, 1909 1,492,492 TalbotApr. 29, 1924 1,495,945 Wyatt May 27,1924

1,612,112 Gordon Dec. 28, 1926 2,483,987 Tuten Oct. 4, 1949

